Bookbinding.



UNITED STATES WILLIAM FOLZ, OF CINCINNATI, OHIO.

vBOOKBINDING.

SPECIFICATION forming part of Letters Patent No. 698,921, dated. April.29, 1902.

Application tiled February 17, 1902. Serial No. 94,508. (No model.)

To LZZ whom t may concern:

Be it known that I, WILLIAu FoLz, a citizen of the United States,residing in the city of Cincinnati, county of Hamilton, and State ofOhio, have invented certain new and useful Improvements in Bookbinding,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming part of thisspecification. My improvements relateto a certain novel and usefulconstruction of stitching for fastening the signatures of the book to bebound together, whereby sufficient space is left between the signaturesto permit of the book being opened out perfectly iiat.

- In the drawings, Figure l is a perspective view of the signatures,showing the method of binding them together. Fig. 2 is a horizontalsection through the middle fold of one of the signatures. Fig. 3 is aperspective view of the signatures notched for binding. Fig. 4 is an endview showing the signatures opened out flat. Fig. 5 is a perspectiveview, much enlarged, of the double loops used in the binding.

A A are the signatures, provided with notches b b in the usualway,and a.a are the laycords, which are mounted in the sewing-press and thesignatures to lbe bound together placed in the press, with the notches bb embracing the cords'. I then secure the stitching-thread c to thesecond of the lay-cords, and thence running to the outer lay-cord I passthe thread with a double loop around this cord, the loop being such asis shown in Fig. 5. The thread is then passed into the middle fold ofthe signature through the notched opening and passed out of the secondnotched opening around the second lay-cord, then into' the signatureagain and around the third cord, and so on to the farther end, where thesame double loop is formed and the stitching-thread pulled tight. Asecond double loop is then formed for the secondsignature and the threadrun Aback through the signature and thefsignatnre .secured to thelay-cords in the same way as in therst signature, a double loop beingformed for the outer lay-cord, and for the third signature anotherdouble loop is formed at each end, as before. The formation of thesedouble loops in pairs at each end of the signature leaves thethreadbetween the two loops for a spacing-thread between the signatures. Thisis shown at d in Fig. 1 somewhat exaggerated. The two sets of doubleloops at each end enable me to secure each signature separately to thelay-cords, so that if the thread should be broken in any of thesignatures it will not release any other signature than the one in whichthe thread is broken. With heavy paper and where more than `the usualnumber of leaves are used in each signature it will be advisable to usethree double loops at each end instead of the two. When all of thesignatures have thus been bound to the laycords, the cords are securedin any suitable way to the covers of the book, and the signatures arehinged to the lay-cords without the necessity of pasting the back edges,as is usually done. In securing the intermediate lay-cords to thesignatures the crossing of the loopV of the stitching-thread is made onthe inner side of the notch in the signature, so that it shall not bebound too closely to the cord.

With this method of sewing the book the th read between the double loopsand the spacing of the loops as they touch each other makes a hingedconnection with the lay-cords, so that when thus bound the book willopen' out and lay perfectly flat, as shown in Fig. 4.

Having thus described my invention, what I claim, and desire to secureby Letters Patshown and described.

WILLIAM FOL-Z.

Witnesses:

GEORGE B. WEIDLER, CHARLES W. HOFFMAN.

